Lock mechanism for breakdown guns.



No. 741,506. I PATENTED OCT. 1-3, 1903. O. KIRIVISE. LOCK MECHANISM FOR BREAKDOWNGUNS.

APPLICATION FILED MAY 6. 1903.

N0 MODEL.

5 accidental firing; and it Patented October is, recs.

I EC-t j OSCAR KIRMSE, or wnIr EYvILLn, CONNECTICUT, ASSIGNOR or ONE- THIRD TO HERMAN H. sCnULz, on NEW HAVEN, CONNECTICUT.

LOCK MECHANISM FOR BREAKDOWN GUNS.

SPECIFICATION forming-part, of Letters Patent No. 741,506, dated October 1 1 Application filed May 6, 1903. Serial No. 155,807. (No model.)

To all whom it may concern.-

Be it known thatI, OSCAR KIRMsiE, of YVhitf neyville, in the county of New Haven and State of Connecticut, have'invented a new and useful Improvement in Breech-Loading Firearms; and I do hereby declare the following, when taken in connection with the accompanying drawings and the numerals of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1, a broken side view of an arm constructed in accordance with my invention with the butt-stock removed and the parts in a fired position; Fig. 2,'a similar view with the firing-pins in amocked position and the triggers locked; Fig. 3, a top or plan view of the same; Fig. 4, a plan view of the safety locking-slide detached.

This invention relates to an improvement in that class of breech-loading firearms in which the barrel is hinged to the frame and tilts upward at the breech end for the insertion into or removal from the barrels of cartridges,-and particularly to guns of that class in which'the barrels are unlocked and the firing pins retracted by the operating-lever mounted'in the top of the frame and adapted L0 to be turned laterally forward, the object of the invention being a simple arrangement of parts whereby by the single operation of the.

lever the barrels are unlocked, the firing-pins are retracted, and the triggers'locked against consists in further details of construction and combinations of parts, as will be hereinafter described, and particularly recited in the claims.

The frame 2 of the gun is of substantially o usual construction, to which the barrels 3 are pivoted so as to swing upwardat the rear for the insertion or removal of cartridges. In the frame in rear of the barrels is a vertically-arranged plug 4, provided at its lower, end with an eccentric stud 5, which sets into a transverse groove 6, formed in the upper end of a longitudinally-movable barrel-locking block 7, which is provided with abarrel-locking arm 8, which extends forward into engagement with the barrels, this barrel-lockin g block being normally forced to its forward or locking position by a spring 9, inserted between the rear face of the barrel-locking block and a post 10, mounted in the lower tang 11 of the frame, the plug4 being turned by a lever 12, which normally stands in line with the upper tang 13 of the frame. The

firing-pins 14 are bowed to extend around the plug4 and are provided with depending lugs 15, which extend .into the path of thebar'rellocking block 7. The tails 16 of the firingpins are bifurcated soas to form spring-jaws 17 18, the lower one, 18, being formed with a notch 19. These bifurcated tails pass through a holdback plate 20, with the rear edge of which the notch 19 will engage to.

hold the firing-pins in a retracted position. Upon the tails of the firing-pins are spiral springs 21, which bear between the lugs 15 and the holdback-plate 20, the tendency being to force the firing-pins forward. A furthe forward end 25 of which is in position to be engaged by the barrel-locking block 7, by the rearward movement of which the safety lock ing-slide is moved rearward. This safety locking-slide has a clearance-opening 26, through Which-the triggers extend, and it is held against upward movement by a headed stud 27, the rear end-of the safety lockingslide extending beneath a book 28. Secured to the rear end .of the safety locking-slide and projecting upwardly and rearwardly therefrom is an arm 29, which projects through the upper tang 18 and is provided at its outer end with a thumb-piece 30, by the movement ofwhich the safety locking-slide may be forced forward or drawn rearward, a friction-spring 31 being arranged beneath the tang 13 to hold the thumb-piece in position. The gun being in a fired position, as shown in Fig. 1, the

lever 12 is turned, rotating the plug 4 and movement of the barrel-locking block by enward and forces the forward edge of the clearance-slot 26 over the shoulder 23 of'the triggers and so as to prevent the triggers being pulled to release the firing-pin, and this safety locking-slide cannot be moved forward until the barrel-locking block 7 has been moved forward into its locking position, at'which time the barrels will be locked by the return movement of the locking-lever 12. Although the gun is thus closed, locked, and cooked, it cannot be fired until the safety lockingslide 24 has been moved forward, which is readily'accomplished by the forward; movement of the thumb-piece 30. When it is moved forward, the triggers can he pulled, and the upward movement of the trigger will lift the. notch 19 out of engagement with the rear wall of the locking-plate 17 and permit the firing-pin to fly forward.

While I have shown a double-barrel gun, it will be evident that the invention is equally applicable for single-barrel guns. After one barreljhas been fired the safety locking-slide may be forced rearward by the movement of the thumb-piece, so as to lock the firing-pin, or, indeed, the safety locking-slide may be moved back and forth at will to lock both triggers, if after loading and cocking the gun it is desired to do so; but each time the gun is opened the triggers are positively locked.

Having fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-

1. In a firearm, the combination with the frame thereof, of a vertically-arranged plug, an operating-handle at the upper endthereof, said plug formed with an eccentric stud at its lower end, alongitudinally-movable barrel-locking block formed with a groove into which said stud extends, a firing-pin formed with a lug extending into the path of the said barrel-locking block, said firing-pin having a rearwardly-extending bifurcated tail the lower member of which is notched, aholdback-plate through which said tail ,extends and with which the notch engages, a trigger adapted to lift said notch outof engagement with the holdback-plate and formed with a shoulder, a safety locking slide having an opening through which said trigger extends said slide adapted to be moved rearward by the rearward movement of said barrel-locking block whereby the forward edge of said opening is passed over the shoulder on the trigger, an arm extending upward and rearward from said slide through the upper tang, and a thumb-piece on the upper end of said arm whereby the slide may be moved forward and backward to lock or release the trigger At the same time it releases the locking which the notches engage,

when the barrel-locking block is movedforward, substantially as described.

2. In a firearm, the combination with the frame thereof, of a vertically-arranged plug, an operating-handle at the upper end thereof, said plug formed with an eccentric stud at its lower end, a longitudinally-movable barrel-locking block formed with a groove into which said stud extends, a spring forcing said block forward, a firing-pin formed with a ing extending into the path of the said barrelblock, said firing-pin having a rearwardly-extending bifurcated tail the lower member of which is notched, a holdbackplate through which said tail extends and with which the notch engages, a trigger adapted to lift said notch out of engagement with the holdback-plate and formed with a shoulder, a safety locking-slide having an opening through which said trigger extends said slide adapted to be moved rearward by the rearward movement. of said barrel-locking block whereby the forward edge of said opening is passed over the shoulder on the trigger, an arm extending upward and rearward from said slide'through the upper tang, and a thumb-piece on the upper end of said arm whereby the slide may be moved forward and backward to lock .or release the trigger when the barrellocking block is moved forward, substantially-as described.

3. In a firearm, the combination with the frame thereof, of a vertically-arranged plug,

IOC

an operating-handle at the upper end thereof,

said plug formed with an eccentric stud at its lower end, a longitudinally-movable barrel-locking which said stud extends, firingpins bowed around said block and formed with lugs extending into the path of said barrel-locking block formed with a groove into block, said firing-pins having'rearwardly-ex- I tending bifurcated'tails the lower members of which are notched, a holdback-plate through which said tails extend and with triggers adapted to lift said notches out of engagement with the holdback-plate and formed with shoulders, a safety locking-slide having anopening through which said triggers extend, said slide adapted to be moved rearward by the rearward movement of said barrel-locking block whereby the forward edge of said opening is passed over the shoulders on the triggers, an arm extending upward and rearward from said slide through the upper tang, and a thumb-piece on the upper endof said arm whereby the slide may be moved forward and backward to lock or release the 'barrel when the barrel-locking block is moved forward, substantially as described.

In testimony whereof -I have ing witnesses.

' OSCAR KIRMSE. Witnesses:

JOHN HUGO, A. M00. MATHEWSON.

signed this. specification in the presence of two subscrib- 

